Joo Jaekyung is a MMA fighter and has a lot of training, he is provided by his coach but he is never satisfied with his request, Joo Jaekyung can sometimes hurt himself, so the coach hires physical therapist for him, but the plan always fails untill one person named Jin Dan, his grandma is in the hospital and needed money to pay hospital bills, since the loan is 14 million, Jin Dan agreed

"This better be worth it, the past physical therapist didn't even know what to do."